test(retry): add tests for retry logic

[rishi-jat]

Summary

Add test coverage for the retry logic used in the backend.

This PR introduces tests that verify retry behavior under different conditions:

• operation succeeds after a few retries
• operation fails after reaching the maximum retry attempts
• retry stops when the context is cancelled
• operation succeeds on the first attempt

The tests use zero delay retry options to ensure they run quickly and deterministically.

[gemini-code-assist]

Summary of Changes

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This pull request significantly enhances the robustness of the backend's retry logic by introducing comprehensive unit tests. These tests cover various scenarios, including successful retries, failure after maximum attempts, and proper handling of context cancellations, ensuring the reliability and correctness of the retry mechanism under different operational conditions.

Highlights

• Test Case: Success After Failures: Added a test to verify that the retry mechanism successfully completes an operation after encountering a few initial failures.
• Test Case: Max Attempts Exceeded: Included a test to confirm that the retry logic correctly fails when the maximum number of retry attempts is reached.
• Test Case: Context Cancellation: Implemented a test to ensure that the retry process properly stops when the provided context is cancelled.
• Test Case: Immediate Success: Added a test to validate that an operation succeeds on its very first attempt without any retries.

Changelog

• pkg/backend/retry_test.go
  • Added a new test file to cover the retry logic.

Activity

• The pull request was created by rishi-jat to add test coverage for the backend's retry logic.

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[gemini-code-assist]

Code Review

This pull request adds valuable test coverage for the retry logic, verifying its behavior under different conditions such as success after retries, max attempts exceeded, and context cancellation. The tests are well-structured and use zero-delay options to ensure they run quickly, which is a good practice. I have one suggestion to make the assertions in the context cancellation test more precise.

[Copilot]

Pull request overview

Adds unit tests around the backend’s retry behavior (built on retry-go) to validate how retries behave across success, exhaustion, and cancellation scenarios.

Changes:

• Introduces a retry-go test helper with zero-delay options to keep tests fast/deterministic.
• Adds test cases for: success-after-retries, max-attempt exhaustion, context cancellation, and immediate success.

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[rishi-jat]

/cc @chlins
/cc @aftersnow

[bergwolf]

lgtm!